Originally Posted by Bass Head
Hmm I don't know if theres a certain formula for finding port sq in but I just went 5.5 times 5.25 to get the surface area of one side of the port, which is 28.875. Multiply that by four to get 115.5! Does that sound right?
I already kinda got my box designed but thanks alot for the offer.
WRONG I will round off to simplify. You have 5 inches X 5 inches. You MUST multiply both the integer and the units.
5X5 = 25 .
Inches X Inches = inches ^2 .
SO you have 25 inches ^2
If you needed to find volume you'd multiply another integer + inches again, hence you'd have inches ^3
Cheap solution is use sono tube for a large round port. 12" round port would be good for a pair of 15's in 6 cube. You'd want it between 26 and 16" long depending on your desired tuning, but sono tube is cheap and easy to tune up (cut it back with utility knife) or tune down (carve it out and insert a longer tube)